My Combinatorics class is full of unfriendly, unhelpful people.

My Combinatorics class is full of unfriendly, unhelpful people. When I had to miss class to take Booka to the doctor, I asked in the GroupMe app and via a classwide email that someone please send me a picture of their notes from the day. Not one single person did it. That's a first for me. Usually students help each other out. Jerks.